JEE Main Chemistry question
For the reaction equilibrium, 2NOBr(g)⇌2NO(g)+Br₂(g), if ₂=P/9 at equilibrium and P is total pressure. The ratio Kp/P is equal to:
Answer: (B)
Solution
Mole fraction Br₂=1/9 gives α=0.25. Mole fractions: NOBr=0.667, NO=0.222, Br₂=0.111. Kp=(0.222P)²(0.111P)/(0.667P)²=0.0123P → Kp/P≈1/81.